Portugal's domestic insurance companies were nationalized in 1975. Foreign companies were required to accept government representatives among their directors. A new law, approved in 1983, allowed the private sector to reenter the domestic insurance industry. Almost all Portuguese companies sell life and nonlife insurance; some specialize in reinsurance only. In the wake of the reprivatization of the insurance industry, many insurance companies have sought alliances with banks. This position, in turn, serves as an impediment to new entrants into the insurance field, particularly from foreign countries. However, the market is opening up and brokers from any European Union (EU) country can operate in Portugal. Third-party auto insurance and workers' compensation are compulsory in Portugal.